Overview of the Android Platform and its programming interface.

1. Android Programming made easy I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone - BjarneStronstrup

3. About me – Lars Vogel (Twitter: @vogella) Independently active in the OpenSource Community, e.g. Eclipse and Android Working for SAP AG as Product Manager Maintains http://www.vogella.de Java, Eclipse and Android related Tutorials with ~15 000 visitors per Received the Eclipse Top Contributor Award 2010

4. The next 58 minutes Android overview Android Tool chain Demos Android Programming Constructs Q&A

5. What is Android? – operating system based on Linux – middleware – key applications – set of APIs Open Source Developed officially by the Open Handset Alliance lead by Google

6. 4 Software layers

8. Dalvik – town in iceland Android Programming You use the Java programming language but Android does not run Java Bytecode Tool dx converts Java Bytecode into Dalvik Executable Code (.dex)

9. Android Programming You use the Java programming language but Android does not run Java Bytecode

10. Calls Uses

11. Developer Toolchain

13. Wizard for creating new project

15. Your first Android app in < 60 secs Timer check Application

16. Command lineadb – Android Debugging Bridgetelnet

17. Android programming constructs

18. Main Android programming constructs Activity Views Intents Broadcast Receiver Services ContentProvider

19. Activity – screen in the Android application Layout – Defines UI elements and their arrangements.

20. Life Cyle of an Activity void onCreate(Bundle savedInstanceState) void onStart() void onRestart() void onResume() void onPause() void onStop() void onDestroy() Android may destroy you!

21. Noteworthy:- ADT maintains the ID‘s automatically in R.java- Resources can be defined via xml

22. I had only the best intents....

24. Two types

25. Explicit: Asking someone to do something

26. Implicit: Asking the system who can do something Intent

27. Services © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)

29. VibratorService

30. LocationService

31. AlarmService

32. ....Access via context.getSystemService(Context.CONST); You can define your own service.

33. Broadcast Receiver – Listen to system events Example: BATTERY_LOW, ACTION_BOOT_COMPLETED Defined statically in manifest or temporary via code

34. Timer check ApplicationLets alert!

35. Security

37. Phone access

38. Contacts

39. Internet

41. There is more....

42. Android Connectivity I can talk and hear Internet (java.net, Apache HttpClient,...) Bluetooth Email SMS I have feelings Camera API Motion Detection Location API (GIS) Heat Sensor Accelerator

43. Storage File System (device or SD card) Preferences Database (SQLightDatabase)

44. Beyond Android – Google API‘s

45. Performance?

46. Performance Sins Avoid creating objects Static rules Avoid to use internal setters and getter (within the same class) Static final for constants Learn on giants (use the libraries) Details: http://developer.android.com/guide/practices/design/performance.html

47. Be fast! Avoid ApplicationNotResponding Error Threads not allowed to modify the UI directly Use handler or AsyncTask to update the UI after Thread is done

48. Summary Android powerful and well-designed development platform Power to the developer

50. Performance snail 1181451

51. Performance Running man 377100

52. Hang-man 620961

53. Summary http://www.sxc.hu/photo/1184807

54. Question http://www.sxc.hu/photo/418215

55. Reading material http://www.sxc.hu/photo/406547

58. Thank you For further questions: Lars.Vogel@gmail.com http://www.vogella.de http://www.twitter.com/vogella

59. License & Acknowledgements This work is licensed under the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License See http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.en_US